220243305 has 16 divisors (see below), whose sum is σ = 352820160. Its totient is φ = 117319488.

The previous prime is 220243259. The next prime is 220243319. The reversal of 220243305 is 503342022.

It is not a de Polignac number, because 220243305 - 2⁶ = 220243241 is a prime.

It is a super-2 number, since 2×220243305² = 97014226794646050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4339 + ... + 21431.

It is an arithmetic number, because the mean of its divisors is an integer number (22051260).

Almost surely, 2^220243305 is an apocalyptic number.

It is an amenable number.

220243305 is a deficient number, since it is larger than the sum of its proper divisors (132576855).

220243305 is a wasteful number, since it uses less digits than its factorization.

220243305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17960.

The product of its (nonzero) digits is 1440, while the sum is 21.

The square root of 220243305 is about 14840.5965176606. The cubic root of 220243305 is about 603.9035350600.

Adding to 220243305 its reverse (503342022), we get a palindrome (723585327).

The spelling of 220243305 in words is "two hundred twenty million, two hundred forty-three thousand, three hundred five".